Question
Earth's magnetic field always has a horizontal component except at or Horizontal component of earth's magnetic field remains zero at
| (a) Equator | (b) Magnetic poles | (c) A latitude of 60o | (d) An altitude of 60o |
Earth's magnetic field always has a horizontal component except at or Horizontal component of earth's magnetic field remains zero at
| (a) Equator | (b) Magnetic poles | (c) A latitude of 60o | (d) An altitude of 60o |
(b) Magnetic poles
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The addition of antimony atoms to a sample of intrinsic germanium transforms it to a material which is
|
(a) Superconductor |
(b) An insulator |
|
(c) N-type semiconductor |
(d) P-type semiconductor |
The mass of a neutron is the same as that of
|
(a) A proton |
(b) A meson |
(c) An epsilon |
(d) An electron |
Two magnets are held together in a vibration magnetometer and are allowed to oscillate in the earth's magnetic field with like poles together, 12 oscillations per minute are made but for unlike poles together only 4 oscillations per minute are executed. The ratio of their magnetic moments is
| (a) 3 : 1 | (b) 1 : 3 | (c) 3 : 5 | (d) 5 : 4 |
To demonstrate the phenomenon of interference, we require two sources which emit radiation
|
(a) Of the same frequency and having a define phase relationship |
|
(b) Of nearly the same frequency |
|
(c) Of the same frequency |
|
(d) Of different wavelengths |